Method for operating electrical machines
AssigneeNordex Energy Spain, S.A.
InventorsTeresa ARLABAN GABEIRAS, Jose Miguel GARCÍA SAYÉS, Ricardo ROYO GARCÍA, Miguel NÚÑEZ POLO
Life of this patent
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Abstract
A solution to optimally manage those requirements ensuring on the one hand, that the requirements set by the grid operators are appropriately and accurately accomplished at a point of interconnection (POI) and on the other hand, preventing the wind turbines from over fulfilling the requirements, for example, by remaining connected at voltages levels higher or lower than the ones required which, although possible, may cause higher loads and currents in the wind turbines than needed to fulfill the requirements.
Claims28
A method for operating an electrical machine, said method comprising:
- coupling the electrical machine to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to the electrical machine;
- and
- configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, wherein configuring the electrical machine comprises:
- electrically coupling at least a portion of a control system to at least a portion of the electric power system;
- coupling the control system in electronic data communication with at least a portion of the electrical machine;
- and
- configuring the electrical machine and the control system such that:
- i. the electrical machine remains electrically connected to the electric power system during and subsequent to the voltage amplitude of the electric power system decreasing below the predetermined range but remaining above a first voltage threshold indicative of a fault within a wind farm electric system for the undetermined period of time and ii. the control system is further configured to at least partially disconnect the electrical machine from the electric power system when the voltage amplitude of the electric power system decreases below the first voltage threshold.
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A wind turbine comprising:
- an electrical machine coupled to an electric power system such that the electric power system is configured to transmit at least one phase of electric power to the electrical machine;
- and
- wherein the electrical machine is configured such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, wherein:
- at least a portion of a control system is electrically coupled to at least a portion of the electric power system;
- the control system is coupled in electronic data communication with at least a portion of the electrical machine;
- and
- the electrical machine and the control system are also configured such that i. the electrical machine remains electrically connected to the electric power system during and subsequent to the voltage amplitude of the electric power system decreasing below the predetermined range but remaining above a first voltage threshold indicative of a fault within a wind farm electric system for the undetermined period of time and ii. the electrical machine is at least partially disconnected from the electric power system by means of the control system when the voltage amplitude of the electric power system decreases below the first voltage threshold.
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Dependencies are inferred from the claim text.